Charging system



FIG. 1 is a top, front, right side perspective view of a charging system having the design of my invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is front elevation view thereof;

FIG. 5 is a right side elevation thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a charging system, as shown and described. 